Lean Six Sigma for Intravenous Therapy Optimization: A Hospital Use of Lean Thinking to Improve Occlusion Management - Nexus ...

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Lean Six Sigma for Intravenous Therapy Optimization: A Hospital Use of Lean Thinking to Improve Occlusion Management - Nexus ...
O R I G I N A L                   A R T I C L E

     Lean Six Sigma for Intravenous Therapy
     Optimization: A Hospital Use of Lean Thinking
     to Improve Occlusion Management
     Lee Steere, RN, CRNI, VA-BC
     Marc Rousseau, MBA, RPH
     Lisa Durland, MS, RPH
           Hartford Hospital, Hartford, CT

     Abstract
     Background: Continual improvement is a necessary part of hospital culture. This occurs by identifying opportunities
     for improvement that influence efficiency while saving money.
     Methodology: An investigation of intravenous device-related practices was performed by the nurses of the intravenous
     access team, pharmacy, and hospital operations at Hartford Hospital using Lean Six Sigma methodology. Central
     venous access device occlusion and tissue plasminogen activator variability was identified. Using observation,
     measurement of performance, and root cause analysis, the hospital’s practices, policies, and equipment were evaluated
     for the process of occlusion management. The team utilized a Six Sigma strategy employing the elements define,
     measure, analyze, improve, and control, which is a disciplined, data-driven methodology that focuses on eliminating
     defects (waste). Interventions initiated based on the assessment performed by the team using the define, measure,
     analyze, improve, and control approach included replacement of negative displacement needleless connectors with
     antireflux needleless connectors and specialty team assessment before tissue plasminogen activator use.
     Results: Over the course of the 26-month study, Hartford Hospital experienced a 69% total reduction in tissue
     plasminogen activator use representing a total 26-month savings of $107,315. Other cost savings were reflected in areas
     of flushing, flushing disposables, and in a decrease in needleless connector consumption. Central line-associated
     bloodstream rates fell 36% following the intervention as an unexpected secondary gain, resulting in further savings
     related to treating this nonreimbursable hospital-acquired condition.
     Conclusions: This study examined the influence of using Lean Thinking and Six Sigma methodology as a tool in saving
     hospital money, resulting in better patient outcomes.
     Keywords: central venous catheter, cost savings, lean six sigma

                          Introduction                                   time during the IV treatment processes.7,8 Intraluminal throm-

A
       mong the most frequent complications associated with              botic catheter occlusion, a common noninfectious complication,
       central venous access devices (CVADs) is catheter oc-             is associated with negative outcomes of loss of patency (43%),
       clusion, ranging from 3%-79%.1-4 Thrombotic formations            device replacement (29%), device removal (14%), and hospi-
on a CVAD are a natural physiological process in response to             tal visits (15%) that all delay or disrupt the treatment process,
the insertion of foreign material into the body. Immediately upon        slow a patient’s progress toward therapeutic goals, and in-
insertion of an intravenous (IV) catheter, cells attach to the surface   crease length of hospital stay and cost of care.1,2,9,10
forming a fibrin coating.5,6 This body response occurs soon after           Peripherally inserted central catheters (PICCs), a type of
insertion and may develop around and within a catheter at any            CVAD, have a higher incidence of occlusion than other chest-
                                                                         inserted central catheters potentially due to factors such as
                                                                         insertion into smaller peripheral veins, larger surface area, use
                                                                         of 3F-6F sizes with multiple lumens, and small catheter
Correspondence concerning this article should be addressed to            diameter.2,11-16 Activities associated with PICCs for administra-
Lee.Steere@hhchealth.org.                                                tion of IV medications and solutions require flushing, aspiration
https://doi.org/10.1016/j.java.2018.01.002                               of blood, and connection and disconnection of needleless con-
Copyright © 2018 Association for Vascular Access. Published              nectors (NCs) causing pressure changes within the catheter that
by Elsevier Inc. All rights reserved.                                    result in venous blood cell deposits within the lumen of the

42        |       JAVA          |        Vol 23 No 1          |      2018
Lean Six Sigma for Intravenous Therapy Optimization: A Hospital Use of Lean Thinking to Improve Occlusion Management - Nexus ...
catheter known as reflux. Reflux is associated with both me-               • Control by building a system of checks and adjustments
chanical and physiological pressure changes that force blood                 for ongoing improvement in the process, protocols, prac-
into the catheter lumen, leaving blood deposits contributing to              tices, products, and patient outcomes (5Ps) of IV therapy.
the incidence of catheter occlusion.17,18
   Reflux of blood into the terminal end of a catheter is a cause          The Hartford IV Team and stakeholders incorporated inves-
of catheter occlusion.19 Patient movements, muscle flexing, and         tigation of the 5Ps of IV therapy for insertion and management
coughing all cause pressure changes and reflux within the cath-         of vascular access devices. This process used the 5Ps as a tool
eter. As the catheter is manipulated, blood is intermittently pulled    to assist in differentiating value-added actions from nonvalue-
back into the catheter.19,20 These deposits of blood on the cath-       added actions. By using the 5Ps systematic approach, waste and
eter may be cleared, somewhat, with saline flushing.21-23 When          variability became obvious and detectable.
catheter lumen flushing is inadequate or blood protein depos-              The LSS program at Hartford continued with agreement from
its completely or partially block the terminal end of the catheter,     the stakeholders from the supply chain and IV Team and from
these occlusions to the terminal end of the catheter may prevent        pharmacy, all committed to performance improvement. Infu-
blood sampling and the infusion of fluids.10,21,24,25                   sion treatment with catheters in our facility represents more than
                                                                        90% of our acute care hospital patients and CVADs are in use
                                                                        in approximately 50% of intensive care patients. Evaluating
                         Lean Six Sigma                                 CVAD occlusion in terms of catheter function, flushing, and
   Hartford Hospital in Hartford, Connecticut, is an 867-bed re-        reflux had the potential to speed treatment and reduce occlu-
gional referral center and the largest Hospital in the Hartford         sion complications. Wasted time, money, medical supplies, and
Health System. Lean Thinking and Six Sigma are 2 process im-            pharmaceuticals and medications as well as logistics and nursing
provement methods the IV Team at Hartford Hospital                      costs were all components because they applied to reported events
implemented to improve infusion therapy practices. The Lean             of occlusion. LSS focuses on reducing defects, variability, and
Six Sigma (LSS) process is used to implement positive change            waste in current hospital IV access device practices.
by identifying inefficiencies, variables, process defects, and
waste.26-31 Specifically, LSS is a quality improvement method-                                      Methods
ology that originated during the 1970s with the Toyota Motor               The LSS methodology was used with the design indicated
Company and Toyota Production System.32 Much of the Toyota              by the DMAIC process to define problems and goals, measure
Production System way of thinking is based on the work of W.            activities and supplies, analyze results, and devise improve-
Edwards Deming.33 Deming taught, among other things, that               ment strategies based on analysis and control throughout the
managers should stop depending on mass inspection to achieve            process. A team of clinicians trained in LSS evaluated proce-
quality, and instead focus on improving the production process,         dures from October 2014 to December 2016 to identify problems,
protocols, practices, and building quality into the product in the      set goals to improve patient outcomes and reduce variability and
first place. LSS strives to pinpoint quality processes that correct     waste resulting in long-term economic change. Goals and ob-
identified defects in a system. Simply put, LSS means using less        jectives for each patient outcome and the variability and waste
to do more.                                                             sections were established for CVAD use, including heparin flush-
   The Lean Thinking concept was used initially in our depart-          ing, occlusion management, medication administration, CVAD
ment to improve the management of occluded CVADs. The                   replacement, and all associated supply costs.
hospital chose to study CVAD occlusion management while
working to promote savings in medications, supplies, and time.                                      DMAIC Phases
This process allowed identification of variables that influ-               The LSS framework for infusion therapy practices at our fa-
enced the way occlusions were managed (ie, assessment of                cility began with a set of value-added actions and improvements
catheter function) and implement corrective actions that im-            identified through the DMAIC process. The DMAIC method
proved patient delivery of treatment without administering              was applied over 26 months as described in Tables 1–5. During
unnecessary medications.                                                the define phase (Table 1), products and patient outcomes were
   The LSS data-driven quality method at Hartford Hospital was          evaluated for IV therapy. A refined literature review delved into
specifically guided by a programmed approach: defining, mea-            subjects of catheter patency; thrombotic occlusion; risks asso-
suring, analyzing, improving, and controlling (DMAIC).34-36             ciated with tissue plasminogen activator (tPA) use; blood reflux;
   The DMAIC phases:                                                    NCs; valves used in catheters and NCs; flush solution volume
                                                                        and frequency; and CVAD indications, appropriate use, and tip
   • Define opportunity for improvement, project goals, and             position.10,17,20-22,37-51 The results of the literature review as-
     patient requirements.                                              sisted in guiding the analysis process.52,53 After defining key
   • Measure pharmacy and medical supply consumption,                   concepts and associated activities the process moved into the
     overall cost, and performance.                                     measurement phase.
   • Analyze the consumption data to determine root causes                 The measure phase (Table 2) of DMAIC distinguishes spe-
     of variation and poor performance (defects).                       cific goals that quantify practices and processes needing
   • Improve process performance by addressing and elimi-               improvement. Measurement key areas included incidence of oc-
     nating the root causes.                                            clusion; drug use for occluded catheters; supply consumption

                                                                 2018         |       Vol 23 No 1         |       JAVA          |      43
Lean Six Sigma for Intravenous Therapy Optimization: A Hospital Use of Lean Thinking to Improve Occlusion Management - Nexus ...
Table 1. Phase I: Define                                                      Table 3. Phase III: Analysisa

 1. Goals and objectives: Improve patient care, improve                        Analyze all data collected and map potential performance
    patient outcomes, reduce waste, reduce IV variability, and                   opportunities
    improve long-term economic results
                                                                               Review new needleless connector technology
 2. Define and review IV therapy 5Ps (IV processes, IV
                                                                               Review literature regarding needleless connectors
    protocols, IV practices, IV products, and IV patient
    outcomes)                                                                  Review infusion therapy evidence
 3. Identify and target a specific hospital area (inpatient acute              Root cause analysis of tissue plasminogen activator use by
    care areas) where peripherally inserted central catheter                     registered nurses in intensive care unit
    and central venous access devices are inserted and used
                                                                               Registered nurses using tissue plasminogen activator
 4. Focus on reducing pharmacy and medical supply waste                          without identifying cause of occlusion
    by:
                                                                               Prioritize opportunities to improve
    a. Tissue plasminogen activator/tissue plasminogen acti-
    vator use and associated cost,                                             IV = Intravenous.
                                                                               a
    b. Flushing with heparin,                                                   Look for signs of IV waste, IV variability, and root causes of defects in our
    c. Replacement and other costs associated with peripher-                   5Ps.
    ally inserted central catheters and central venous access
    devices, and                                                                 In the analysis phase (Table 3), information obtained during
    d. Reducing medical supply consumption and medical supply                 the measure phase was mapped to demonstrate performance im-
    costs                                                                     provement opportunities as they applied to PICCs and all other
                                                                              CVADs. Root cause analysis of each occurrence of CVAD oc-
 IV = Intravenous.                                                            clusion incorporated the 5Ps. Each identified occlusion event
                                                                              was accompanied by use of a thrombolytic medication (Cathflo;
specific to NCs; catheter volume and line days; and influence                 Genentech Laboratories, San Francisco, CA). Heparin and saline
on central line-associated bloodstream infections (CLABSIs).                  flushing practices, NC use, and associated supplies were in-
NCs and add-on peripheral supplies were also evaluated and                    cluded in the analysis. Understanding the outcomes of occlusion
quantified. The NCs in use at our facility included a negative                and subsequent complications led researchers to establish an im-
displacement valve (Clave; ICU Medical, Inc, San Clemente,                    plementation plan that resulted in improvement.
CA). Collection of data, performed by the LSS clinicians and
IV Team, established baseline levels for improvement, com-                    Table 4. Phase IV: Improvea
parison, and analysis.
                                                                               1. All nontunneled central venous access device catheters
                                                                                  shall be effectively assessed by a trained and skilled IV
Table 2. Phase II: Measurea                                                       Team RN for thrombotic occlusion before tissue
                                                                                  plasminogen activator is ordered
 1. Obtained alteplase/tissue plasminogen activator
    consumption data from pharmacy department                                  2. Nontunneled Central Venous Access Device Patency
                                                                                  Assessment Algorithm/Check List will be used to
 2. Obtained prefilled heparin flushing syringe consumption                       determine root cause of occlusions
    data
                                                                               3. IV Team will receive all orders from intensive care nurses
 3. Reviewed alteplase/tissue plasminogen activator and                           so proper and effective assessments can be achieved by a
    heparin flushing 5Ps                                                          trained and skilled IV Team RN
 4. IV Team began receiving daily tissue plasminogen                           4. IV Team RN will order tissue plasminogen activator if
    activator consumption report from pharmacy department                         appropriate
 5. Obtained central line-associated bloodstream infection                     5. Eliminate prefilled maintenance heparin flushing with
    rates since 2007                                                              evidence-based outcomes
 6. Obtained central line days since 2007 data                                 6. Implement use of Anti-Reflux NC to reduce unintentional
 7. Obtained needleless connector consumption data                                blood reflux into peripherally inserted central catheter and
                                                                                  central venous access devices and the associated risk of
 IV = Intravenous.                                                                central line-associated bloodstream infection
 a
  We measured the 5Ps (IV processes, IV protocols, IV practices, IV prod-
 ucts, and IV patient outcomes) against our defined goals and objectives       VAT = Vascular access team.
                                                                               a
 to determine our current performance and quantify improvement                  Improve processes, protocols, practices, and products to eliminate waste,
 opportunities.                                                                variability, and defects to improve patient care and outcomes.

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Table 5. Phase V: Controla                                                                  antireflux NCs (Nexus Medical TKO-6P; Nexus Medical LLC,
                                                                                            Lenexa, KS) designed to promote long-term patency.47 Out-
 1. Nontunneled Central Venous Access Device Patency                                        comes based on the antireflux NC change were reduced occlusion
    Assessment Algorithm/Check List continues to deliver the                                and NC supply consumption. Each of these improvement mea-
    control necessary to sustain the tissue plasminogen                                     sures was projected to influence and reduce incidence of not
    activator use reduction, improvement in patient outcomes,                               only occlusion, but also CLABSIs, reduce delays in treatment
    and hospital economics                                                                  of occluded catheters, and improve patient satisfaction by re-
                                                                                            ducing anxiety associated with nonfunctional CVADs.
 2. The antireflux needleless connector automatically provides
                                                                                               In the control phase (Table 5), processes were applied to all
    blood reflux protection to sustain the heparin and
                                                                                            5Ps to improve performance. The control process included imple-
    corresponding tissue plasminogen activator use
                                                                                            menting an electronic medical record ordering process for tPA
    reductions that improve patient care and hospital
                                                                                            that was hidden from view and application of an algorithm
    economics
                                                                                            (Figure: Process Control for Occlusion Management) to eval-
 3. Unintentional blood reflux is controlled via use of                                     uate all CVAD occlusions. Over the 26-month period, all
    antireflux needleless connector and the risk of infection                               stakeholders adopted these value-added actions and improve-
    and central line-associated bloodstream infection is                                    ments to maximize care practices for patients with IV access
    reduced                                                                                 devices at Hartford Hospital.
 a
  Control processes, protocols, practices, and products to eliminate waste,
 variability, and defects to improve patient care and outcomes.
                                                                                                                        Results
                                                                                               The number of inpatient acute care patients with CVAD oc-
                                                                                            clusions treated with tPA averaged 119 per month during 2014.
  The improve phase (Table 4) addressed the specific practice                               Following implementation of an algorithm for appropriate use,
measures designed to meet the goals through the 5Ps. These mea-                             IV Team assessment, and antireflux NCs, the hospital achieved
sures included CVAD occlusion evaluation by the IV team before                              a 56% reduction to a new average annual baseline of 53 oc-
use of any thrombolytic medication. Compliance with flushing                                clusions per month for 2015. Further, the hospital achieved a
practices was measured as part of the processes instituted in the                           61% reduction in tPA use for occlusions to a new average annual
previous phase. Negative displacement NCs were replaced with                                baseline of 47 occlusions per month for 2016 (Table 6). The

Table 6. Baseline 2014 With Negative Displacement Connector Changing to Anti-Reflux Connector 2015-2016

                         140

                         120
                               [VALUE]                  2014 Average Baseline tPA Consumption 119/mth for Negative Displacement NC's
                                 AVG

                         100
                                                   2015 Average Monthly tPA Consumption 53.18 for a 56% overall reduction from 2014 Baseline

                         80
             TPA USAGE

                                                   2016 Average Monthly tPA Consumption 47.5 for a 61% overall reduction from 2014 Baseline

                         60
                                                                    60
                                                                                                         58                        55
                                                                                               59
                         40              [VALUE]           46                                                                                  47    45
                                          AVG      51                                                                     42
                                                                             38                                   37
                                                                                      31
                         20

                           0
                               BaselineBaseline Jan        Feb     Mar       Apr     May       Jun       Jul     Aug      Sep      Oct     Nov      Dec
                                2014 2015 2016            2016     2016     2016     2016     2016      2016     2016    2016     2016     2016     2016

                                                                                    2018            |          Vol 23 No 1           |          JAVA       |   45
Figure. Process flow for occlusion management.

monthly range reflected a low of 31 occulusions per month to     tion of 66,100 NCs (Table 7). The results of decreased occlusion,
high of 60 occlusions per month. Decreased tPA consumption       lower tPA use, and different NCs resulted in a positive annual
(at a cost of $65 per 1-mg dose) resulted in savings for 2015    savings of $100,670. Antireflux NCs have been validated for a
of $51,480 per year and for 2016 of $55,835 per year. Over the   full 7-day use, rather than the twice-a-week change associated
course of the 26-month study, Hartford Hospital experienced      with the NC our facility previously used. This resulted in less
a 69% total reduction in tPA use, representing a total 26-       product use, less frequent CVAD line opening, and overall fewer
month savings of $107,315 (Table 6).                             catheter occlusions.
   Following the intervention of new NCs there was a sus-           Flushing practices were reported from October 2014 through
tained medical supply reduction of 38%. The antireflux NCs       December 2016. Heparin flush use volume at baseline (2014)
showed a consumption reduction of 41%, which represented an      was 52,522 syringes at a cost of $0.55 per syringe. Heparin
annual decrease of 44,493 NCs. Costs associated with the pre-    flush syringes were eliminated from the protocol while
vious negative displacement connector was $105,064 annually      prefilled 10-mL saline flush syringes remain. The elimination
with a total consumption of 110,593 NCs. The replacement         of heparin flushing syringes resulted in savings of $28,887
antireflux NCs cost $111,709 annually with a total consump-      annually.

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Table 7. tPA Usage Baseline 2014 with Negative Displacement Connector Changing to Anti-Reflux Connector 2015-2016

   In addition, the incidence of CLABSI as a secondary end point       interruption16,54; negatively affects patient, clinical staff, and phar-
was evaluated. Retrospective data were combined with CLABSI            macy staff; and results in economic loss for hospital
results to reflect decreasing incidence from 2007 to 2016. Eval-       administration. Controls, such as assessment of catheter and in-
uation of the hospital intensive care unit CLABSI rate identified      sertion sites by vascular access specialists; use of an algorithm
reductions from a 2007 calendar year high of 39 CLABSIs to             to properly troubleshoot reported occlusions; instillation of tPA
a low of 9 CLABSIs in 2016. This change in CLABSIs repre-              only after careful assessment by vascular access specialists; and
sented a 77% decline over 9 years. Even more notable, the              ongoing education of clinical staff for productive flushing, ap-
hospital’s overall safety score fell from 0.475 to 0.301, a 36%        plication of infection prevention measures, and aseptic technique
reduction, well below the national average of 0.437.                   for device management all worked together to improve patient
                                                                       outcomes and reduce risk. Using a focused approach to process
                             Discussion                                improvement by combining Lean Thinking and Six Sigma, Hart-
   Concerns over patient outcomes and the promotion of a culture       ford Hospital achieved an increase in positive outcomes.
of safety drove Hartford Hospital to examine processes, pro-              Improvement represented by this initiative was sustained re-
tocols, practices, and products along with outcome data collection.    duction in CVAD occlusions and tPA use. Sustained improvement
Ongoing patient and catheter complications resulted in cathe-          is supported by methods instituted by the IV Team. During this
ter failure, including occlusion, phlebitis, and infection. These      intervention the focus was on 3 key drivers: patient satisfaction,
complications influenced function and efficacy in the delivery         quality, and improvement. One measure of those drivers was the
of treatment and thus were targeted by our facility’s LSS health       amount of tPA used during the prior 24 hours. The IV Team re-
care initiative. The findings from the LSS DMAIC reflected areas       viewed every dose of tPA given via performance of an abbreviated
of variability in CVAD occlusion management, NCs, flushing             root cause analysis. The IV Team verified that the algorithm had
with heparin, and incidence of CLABSI.                                 been applied and if not, the Team investigated the deviation.
   Application of LSS identified specific components of the            Reasons for tPA administration was documented on a Pareto Chart
patient care process that were costly roadblocks to success. Cath-     (depicting the frequency with which certain events occur), which
eter failure influences the ability to deliver treatment without       allows better analysis of certain areas needing improvement. The

                                                                2018          |       Vol 23 No 1           |       JAVA           |       47
Timeline 1. Calendar Year Analysis and Interventions 2007 to 2016

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       Needleless Connector Change to An-Reflux, VAT all CVAD Dressings, Heparin
                                                                                                                                                                                                                                                                                                                    Alcohol Disinfecon Caps, Competency & Compliance Audits
                                                                            39

                                                                                   HAI Commiee Formed - Policy Review and Analysis
                                                                      40

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          VAT CVAD Removals, Phlebotomy Training for Blood Cultures
                                                                                                                                                 CVAD Rounding, Huddles, Eyes on Lines, Educaon

                                                                                                                                                                                                                                                                                                                                                                                        Quality Measures Changed to VAP, Rounding Reduced
                                                                                                                                          37
                                                                                                                                                                                                     36

                                                                      35                                                                                                                                                                                                                                                                                                         34

                                                                                                                                                                                                                                                             Anmicrobial Dressing, CVAD Dressing Kits
                                                                                                                                                                                                            CVAD Inseron Check List, IP Educaon
              Crical Care-Catheter Related Blood Stream Infections

                                                                                                                                                                                                                                                                                                                                                                                                                                                     CVAD Rounding Resumed, USGPIV Training
                                                                                                                                                                                                                                                     30
                                                                      30

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Educaon. EPIC EMR Launched
                                                                      25
                              Number of Infecons

                                                                      20
                                                                                                                                                                                                                                                                                                             17
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               16

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       Eliminaon
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    15
                                                                      15
                                                                                                                                                                                                                                                                                                                                                                                                                                             13

                                                                      10                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 9

                                                                      5

                                                                      0
                                                                            2007                                                          2008                                                      2009                                            2010                                                     2011                                                              2012                                                         2013                                              2014                                                                                 2015                                                                2016
                                                                           Catheter Days                                                                                                           18,997                                           20,932                                               21,196                                                                20,287                                                       16,399                                            14,857                                                                15,002                                                                            14,004

IV Team at Hartford Hospital continues to meet at 7:15 AM daily                                                                                                                                                                                                                                                                                                                  toring. This major change in hospital computer systems influenced
for a Lean huddle. Every idea generated by the staff of the IV                                                                                                                                                                                                                                                                                                                   the protocol and ordering process for tPA. There was concern that
Team is considered as a possible LSS project.                                                                                                                                                                                                                                                                                                                                    our tPA use would rise, but initiatives hardwired during the LSS
   The NC change and heparin elimination have continued to result                                                                                                                                                                                                                                                                                                                phases were consistently maintained. No increase in tPA use re-
in reductions in CLABSI. CLABSI risk factors are multimodal,                                                                                                                                                                                                                                                                                                                     sulted from the changes in the electronic medical record. The IV
with risk at insertion and during management of CVADs. CLABSI                                                                                                                                                                                                                                                                                                                    Team continued to directly monitor tPA use daily, focusing on
reduction initiatives began at Hartford Hospital in 2007 with CVAD                                                                                                                                                                                                                                                                                                               why was it given, interventions performed prior, and who is or-
rounding, huddles, and an Eyes on CVADs campaign. Founda-                                                                                                                                                                                                                                                                                                                        dering. Education of bedside nurses was instituted to improve
tional principles of a central line bundle consistent with                                                                                                                                                                                                                                                                                                                       practices that prevented occlusion. Education included training
recommendations were applied through hospital education                                                                                                                                                                                                                                                                                                                          of productive flushing with a push pause action that creates tur-
programs.55-57 After instituting education from 2007-2012, con-                                                                                                                                                                                                                                                                                                                  bulence and greater flush volume as needed. Bedside staff became
cerns over NC contamination were expressed as potentially                                                                                                                                                                                                                                                                                                                        accustomed to the new flushing practice and members of the IV
occurring during flushing practices, resulting in NC coloniza-                                                                                                                                                                                                                                                                                                                   Team evaluating catheter function before ordering of tPA. The
tion. Alcohol disinfection caps have been in use since 2010,                                                                                                                                                                                                                                                                                                                     bedside clinical staff has expressed appreciation for the IV Team
including compliance audits, but CLABSI rates spiked in 2012.                                                                                                                                                                                                                                                                                                                    efforts to help with troubleshooting occlusions, reducing medi-
Occlusion in conjunction with blood reflux and NCs had not been                                                                                                                                                                                                                                                                                                                  cation administration delays and time spent with assessment, thus
considered as a risk factor despite the connection between throm-                                                                                                                                                                                                                                                                                                                giving clinicians more time to focus on taking care of patients.
botic occlusion and infection.58,59 In 1 study,41 the relative risk of
CLABSI associated with tPA use was 3 times that of patients who                                                                                                                                                                                                                                                                                                                                              Limitations
did not receive tPA. Although there were variables and limita-                                                                                                                                                                                                                                                                                                                      This study has several limitations. First, the retrospective nature
tions within the study period, the results suggest that the subsequent                                                                                                                                                                                                                                                                                                           of the data collection for baseline results may reflect inaccu-
change to antireflux NCs and limited tPA use resulted in CLABSI                                                                                                                                                                                                                                                                                                                  racies inherent in retrospective reviews. Measurement and
reduction to a low of 9 infections in the critical care unit for 2016.                                                                                                                                                                                                                                                                                                           tabulation of results were from methods that incorporated
Continued research is needed to completely evaluate the influ-                                                                                                                                                                                                                                                                                                                   individual input, supply consumption data from material con-
ence of reflux and tPA on infection risk within CVADs.                                                                                                                                                                                                                                                                                                                           sumption and replacement of product, computer results of use
   Hartford Hospital transitioned into a new electronic medical                                                                                                                                                                                                                                                                                                                  within pharmacy distribution, and a period of years where com-
record system during August 2016. With this transition, there was                                                                                                                                                                                                                                                                                                                puter upgrades and software changes may compound
a temporary reduction in data input and control over tPA use moni-                                                                                                                                                                                                                                                                                                               inaccuracies. Second, variables with multiple interventions in-

48        |                                                 JAVA                                                                      |                   Vol 23 No 1                                                                                                                                    |                                                                 2018
stituted and overlapping resulted in an inability to clearly indicate     9. Gorski L, Perucca R, Hunter M. Central venous access
the intervention and its direct influence. A series of interven-             devices: care, maintenance, and potential complications. In:
tions initiated by the Healthcare Acquired Infection Committee               Infusion Nursing: An Evidence-Based Approach. 3rd ed.
occurred during the application of the LSS process. Variables                St Louis, MO: Saunders/Elsevier; 2010:495-515.
were reduced during the final 2 years as the IV Team took more           10. Hadaway L. Major thrombotic and nonthrombotic
direct responsibility for interventions and activities of assess-            complications. Loss of patency. J Intraven Nurs.
ment, dressing changes, and complications management.                        1998;21(suppl 5):S143-S160.
                                                                         11. Valbousquet Schneider L, Duron S, Arnaud FX, et al.
                         Conclusions                                         Evaluation of PICC complications in orthopedic inpatients
   This Lean Thinking process with application of the Six Sigma              with bone infection for long-term intravenous antibiotics
DMAIC and 5Ps principles resulted in significant sustained im-               therapy. J Vasc Access. 2015;16:299-308.
provement for our facility. Staff communication, goal setting,           12. Hertzog D, Waybill P. Complications and controversies
and application of a process established a staff culture that is             associated with peripherally inserted central catheters. J Infus
continually striving for better outcomes. The steps for defin-               Nurs. 2008;31:159-163.
ing, measuring, analyzing, improving/implementing, and                   13. Bartock L. An evidence-based systematic review of literature
controlling the system identified areas of deficiency for CVAD               for the reduction of PICC line occlusions. J Assoc Vasc
occlusion management, flushing, and supply use. Reduced com-                 Access. 2010;15:58-63.
plications and cost savings provided value for the hospital. Of          14. O’Brien J, Paquet F, Lindsay R, Valenti D. Insertion of
greater importance was the reduction of treatment delays and                 PICCs with minimum number of lumens reduces
elimination of unnecessary medications and procedures.                       complications and costs. J Am Coll Radiol. 2013;10:864-
                                                                             868.
                           Disclosure                                    15. Ullman A, Marsh N, Mihala G, Cooke M, Rickard C.
  Lee Steere is part of the Nexus Medical Speakers Bureau and                Complications of central venous access devices: a systematic
has received honorarium for speaking engagements.                            review. Pediatrics. 2015;136:e1331-e1344.
                                                                         16. Smith S, Moureau N, Vaughn V, et al. Patterns and
                      Acknowledgment                                         predictors of peripherally inserted central catheter occlusion:
  The authors thank Nexus Medical LLC (Lenexa, KS) and ICU                   the 3P-O study. J Vasc Intervent Radiol. 2017;28:749-756.
Medical, Inc. (San Clemente, CA) for providing non-monetary              17. Mayo DJ. Reflux in venous access devices: a manageable
project support and Nancy Moureau, RN, PhD, CRNI, CPUI,                      problem. J Vasc Access Device. 2001;6:39-40.
VA-BC for assisting with editing of the manuscript.                      18. Chauhan A, Ghigo J-M, Beloin C. Study of in vivo catheter
                                                                             biofilm infections using pediatric central venous catheter
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